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ters may cause damage to the installation.
A safety device has to be fitted in order to comply
with the regulations. This manual reset device,
which is independent from the regulation system,
must cut off the heat supply and should function
even in the absence of power or motor fluid. The
connection of a switching device to connector No. 6
of the control box satisfies this requirement.
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Installing this type of boiler as part of a floor heating
system imposes the same constraints as for the pre-
vious version, namely that the internal regulator pa-
rameters have to be changed (§ 2.2.2 - Chapter III -
OPERATION) and an independent safety device
has to be fitted.
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The THR is a condensing boiler, so a sealed flue
has to be used. The combustion products are satu-
rated with water vapour which will continue to con-
dense on the tubing walls. The condensate
therefore has to be collected at the base of the con-
duit and fed towards the drain. As the condensate is
acidic (pH = 4), the use of a stainless steel conduit
is recommended.
Note:
- Avoid horizontal sections where condensation is
liable to collect. Always ensure a minimum slope
of 2 % is used (low point on boiler side).
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